How fast can a horse run?

The top speed of a horse depends on the breed, training, and distance it is running. Most horses can reach a top speed of around 55 kilometers per hour (34 miles per hour). However, some Thoroughbred racehorses have been known to reach speeds of up to 70 kilometers per hour (43 miles per hour). The world record for the fastest speed recorded for a horse is 87.2 kilometers per hour (54.2 miles per hour), which was set by Thoroughbred racehorse Secretariat in 1973.